"atjo" wrote in message
oups.com...
Go to http://vzone.virgin.net/roger.simmonds/dear.htm and you can find
a formula that works for me. To get me in the ball park I just subtract
finished SG from the beginning SG, for get the decimels and devide by
7. That is close enough for me. Using my rounding system your alcohol
level would be 15.4%. Useing the correct ffigures it would be 108/7.04
= 15.3409.Aubrey


Nope. Your reference got it wrong so now you have it wrong. Authors
are not infallible. Be careful what you choose for a reference. HTH